102 (number)
102 (one hundred [and] two) is the natural number following 101 and preceding 103.
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| Cardinal | one hundred two | |||
| Ordinal | 102nd (one hundred second) | |||
| Factorization | 2 × 3 × 17 | |||
| Divisors | 1, 2, 3, 6, 17, 34, 51, 102 | |||
| Greek numeral | ΡΒ´ | |||
| Roman numeral | CII | |||
| Binary | 11001102 | |||
| Ternary | 102103 | |||
| Octal | 1468 | |||
| Duodecimal | 8612 | |||
| Hexadecimal | 6616 | |||
In mathematics
102 is an abundant number and semiperfect number. It is a sphenic number. It is the sum of four consecutive prime numbers (19 + 23 + 29 + 31).
The sum of Euler's totient function φ(x) over the first eighteen integers is 102.
102 is the third base 10 polydivisible number, since 1 is divisible by 1, 10 is divisible by 2 and 102 is divisible by 3. This also shows that 102 is a Harshad number. 102 is the first 3-digit number divisible by the numbers 3, 6, 17, 34 and 51.
In science
- The atomic number of nobelium, an actinide.
In other fields
102 is also:
- The emergency telephone number for police in Ukraine and Belarus
- The emergency telephone number for fire in Israel
- The emergency telephone number for ambulance in parts of India
- The emergency telephone number for ambulance in Maldives
See also
- List of highways numbered 102
- One Hundred and Two, a song by The Judds
References
- Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 133
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